Tone arm and wireless headpiece coupling



Feb 2,11%. 1,5?1,24

E. J. KIRK ET AL TONE ARM AND WIRELESS HEADPIECE COUPLING Filed March 27, 1922 Patented Feb. 2, 1926.

UNITED STATES PATENT OFFICE.

EUGENE J. KIRK AND THOMAS D JONES, OF KANSAS CITY, MISSOURI, AND FRANK B. FISHER, JR., OF KANSAS CITY, KANSAS.

TONE ARM AND-WIRELESS HEADPIECE COUPLING.

Application filed. March 27, 1922. Serial No. 546,979.

To all whom it may concern:

Be it known that We, EUGENE J. KIRK, THOMAS D. JoNEs, and FRANK B. FISHER, Jr., citizens of the United States, the said KIRK and JoNEs being residents of Kansas City, Jackson County, Missouri, and the said FISHER being a resident of Kansas City, WVyandotte County, Kansas, have invented a- .certain new and useful Improvement in Tone Arm and Wireless Headpiece Couplings of which the following is a complete speci cation. I

This invention relates to amplifying instruments for use with wireless telephone receivers and our object is to provide an eflicient device whereby the ordinary head telephone receiver used in wireless apparatus may be quickly and easily connected to the. tone arm of a phonograph or the like, and the sound reproduced by said receiver, projected through the tone arm and horn of the phonograph and thu greatly amplified, so that it may be heard throughout all parts of a room.

Another object of the invention is to provide a device of the character set forth adapted for use with the tone arms of any of the common and well-known types of phonographs, and which is also adapted to be used with any of the common and wellknown types of head phones.

With the objects named in view, the invention consists in certain novel and useful features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in which Figure 1 is a perspective view of the device as adapted for use with certain types of phonograph tone arms and telephone receivers;

Figure 2 is a central vertical section of the same; and

Figure 3 is a broken sectional view of the device as it will appear when used with a diiferent type of receiver.

In the said drawing, where like reference characters identify corresponding parts in all of the figures, 1 illustrates a casing member of substantially tubular shape and forming a chamber 2, closed at one end and provided with an opening or mouth 2 at its other end. The mouth 2 of the chamber is formed both internally and externally with tapering walls, and is of such diameter that the outside taper may be fitted within the end of the tone arms of certain types of phonographs, while the endof the tone arm of certain other types of phonographs will 6 fit within the tapering opening, as will be readily understood, the opening being of tapering form so that a tight and close fit may be secured in both instances to avoid the chances of loss of sound.

Integrally formed with a member 1 is a casing member 3, threaded internally and forming a diaphragm chamber 4, the latter being in communication with the chamber 2 by means of a passageway 5.

In order to Secure the head phone to the device, the cap of such receiver is removed, and in one type of head phone (see Figure 2), an internally and externally threaded ring 6 is engaged with the threads of the 75 member 3 and the head phone 7 is engaged with the internal threads of said ring 6, a

, washer 8 or the like, being interposed between the diaphragm 9 of the receiver and the member 3, as clearly shown in Figure 2, in order to reliably clamp the diaphragm in position and hold the same free for the necessary vibration for the reproduction of sound transmitted to such receiver.

In the device, as shown by Figure 3, another type Of head phone is illustrated, the member 3 being made of sufllcient diameter as to be adapted for threaded engagement with such type of receiver after the removal of 1ts cap, and the diaphragm 9, in this instance, will be clamped against the shoulder 10 of the casing 3.

As the end of the tone arm of certain types of phonogra hs is of equal diameter to that of the inout 2", a sleeve 11 tapering toward both ends, is fitted in said mouth 2. The end 12 of the tone arms of such types of phonographs snugly receives the projectin tapering end of the sleeve, (see Figure 2 I It will be evident from the above descri tion that when it is desired to employ t e device with any of the various phonogra he the sound box of such phonograph must rst be disconnected and the device of the inven- 1 tion slipped over or inserted within, the end of the tone arm, as the case may be, in order to make the necessary connection.

It is desirable to point out that the device of the invention is preferably made of substantially right-angle shape in order that such device may be-universal in its application-that is, so that it may be used with phonograph tone arms having a side rather than an end openin From the above description, it will be apparent that we have produced a device of the character described, which possesses all of the features of advantage set forth as desirable, and While we have described and claimed the preferred embodiment of the same, we reserve the right to make all changes properly falling within the spirit and scope of the appended claims.

We claim:

1. In a device of the character described, a circular casing, a sound tube rigidly closed at one of its ends and having its other end terminating in an outwardly tapering opening, a neck connecting said casing and sound tube and formed with a passageway communicating substantially coaxially with the casing at one of its ends at its other end intersecting said tube at a point between the ends of such tube.

2. In a device of the character described, a circular casing, a telephone receiver in communication with said casing, a sound tube carried by said casing in a plane parallel to the plane of the diaphragm of said receiver; the sound tube being rigidly closed at one end and having its other end terminatin in an outwardly tapering opening and also having a passageway communicating with the casing, the passageway intersectin the tube at a point between the ends of suc tube and being substantially coaxial with the casing.

3. In a device of the character described, a circular casing, a telephone receiver in communication with said casing, and a sound tube carried by the casing in a plane parallel to the plane of the diaphragm of the receiver; said tube being rigidly closed at one of its ends and having its other end open, the periphery of said open end being beveled both internally and externally.

4. In a device of the character described, a circular casing, a telephone receiver in communication with said casing, a sound tube carried by the casing in a plane parallel to the plane of the diaphragm of the receiver; said tube being rigidly closed at one of its ends and having its other end open, the internal periphery of said opening being outwardly tapered, and a sleeve adapted to be received Within said tapering opening.

5. In a device of the character described, a circular casing, a telephone receiver in communication with said casing, a sound tube carried by the casing in a plane parallel to the plane of the diaphragm of the receiver; said tube being rigidly closed at one of its ends and having its other end open, the internal periphery of said opening being outwardly tapered, and a sleeve formed with an oppositely tapered external surface detacha ly fittlng at one of its ends in said tapered sound tube opening.

In witness whereof we hereunto aflix our signatures.

EUGENE'J. KIRK. THOMAS D. JONES. FRANK B. FISHER, JR. 

